Factors of intersectional unilateral cross incompatibility between several evergreen azalea species and Rhododendron japonicum f. flavum

Kenji Ureshino, Miyoko Kawai, Ikuo Miyajima

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15 Citations (Scopus)


The mechanism of unilateral cross incompatibility in the reciprocal crossings between several evergreen azalea species and R. japonicum f. flavum behavior of pollen tube growth in the styles was studied. In crossings using evergreen azalea as seed parents, straight, thin pollen tubes elongated into the lower portion of style within 96 hr after pollination, but in those using R. japonicum f. flavum as seed parents, the pollen tube with abnormal morphology were arrested in the upper portion of the styles. These results indicate that the cross incompatibility of R. japonicum f. flavum x evergreen azaleas is accompanied by abnormal pollen tubes and a restriction of their growth in the upper portion of the style.

Original languageEnglish
Pages (from-to)261-265
Number of pages5
JournalJournal of the Japanese Society for Horticultural Science
Issue number3
Publication statusPublished - May 2000


All Science Journal Classification (ASJC) codes

  • Horticulture
  • Plant Science

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